In a Finance Class, the Final Grade Is Based on Three

Multiple Choice

In a finance class, the final grade is based on three tests. Historically, the instructor tells the class that the joint probability of scoring "A"'s on the first two tests is 0.5. A student assigns a probability of 0.9 that she will get an "A" on the first test. What is the probability that the student will score an "A" on the second test given that she scored an "A" on the first test?

A) 0.50
B) 0.95
C) 0.55
D) 0.90